Short circuit? REALLY need help!

Question

iPhone 4

iPhone di quarta generazione. La riparazione è semplice, ma il vetro anteriore e l'LCD andranno sostituiti insieme. GSM / 8, 16, or 32 GB di memoria / Modello A1332 / Nero e Bianco.

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Mittchel @mittchel

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Postato: 21 lug 2012

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Short circuit? REALLY need help!

Hello everyone,

I've been trying to put a new screen on my iPhone 4, but during the process something terrible happend. My iPhone wouldnt start anymore so I removed my battery. I noticed an screw underneath my battery..

Did my iPhone short circuit? Cause it won't fireup anymore:S

Is there any else I can do? I tried the battery of my girlfriends iphone, but that didnt work either!

Please help!

EDIT:

I inserted my battery charger and I hear the sound of charging.. whats wrong?:P

Could it be my LCD screen?

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Soluzione Prescelta

Nick @nick

Rep: 88,8k

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Postato: 21 lug 2012

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It sounds like it starts up, but the backlight IC or filters are bad. This usually happens if you do not turn the phone off or do not disconnect the battery when you work on it.

Check for a image with a flashlight. If this shows something the backlight IC or screen is bad. Easiest way to tell is fit the old screen to see. If it works, it's the screen. If not, it's the backlight IC or fuse.

The problem here is so many people blame the coil, everyone is selling the coil. It's not exactly easy to find the IC or filters. Very few people sell them because everyone wants to think it's the coil. If the board is bad, this will require some serious searching.

Here's a guide on motherboard removal to check. Look for visual hints and have a multimeter and schematic ready. They can look fine, but are still bad. They don't always release the magic smoke when they die. Replace any damaged or shorted parts. You may need to remove the RF shields too. Many parts are hidden there.

Sostituzione scheda logica iPhone 4

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5 Commenti:

Thanks, so basically try my old screen assembly? :)

22 lug 2012 da Mittchel

Mother of god. This was my first iPhone assembly/reassembly. So I kinda cried when you were talking about soldering. Luckly, the phone works! With old screen though.. what could have happend? The new LCD short circuited? Cause why didnt the backlight work? When I powered on I saw no lighting at all.. Or maybe the LCD was delivered with flaws.

Thanks Nick

22 lug 2012 da Mittchel

Yeah, sounds like it was DOA or shorted, it's really a tough call as to which happened

22 lug 2012 da Nick

try contacting the company you bought the screen from..if there is no evidence of damage to the flex cable or pins then maybe you have received a dud screen. A lot of companies are now testing all screens before shipping as people tend to crimp or damage the flex in installation and then claim a damaged screen was sent out. You need to check the returns policy and fine print..

22 lug 2012 da pollytintop

I sent an e-mail to the guy and he told me he tested them before they ship. I said I didn't know what happend, but I haven't seen it turn on and after replacing my old one it did work. I said I'm not stating its damaged, but possibly could be damaged. He said it's okay, since I ordered there a few parts before. He sent me a new screen and I've to send the old one back. Clearly got lucky there. Thanks for the help guys.

23 lug 2012 da Mittchel

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Mother of god. This was my first iPhone assembly/reassembly. So I kinda cried when you were talking about soldering. Luckly, the phone works! With old screen though.. what could have happend? The new LCD short circuited? Cause why didnt the backlight work? When I powered on I saw no lighting at all.. Or maybe the LCD was delivered with flaws.

Thanks Nick — Mittchel
Yeah, sounds like it was DOA or shorted, it's really a tough call as to which happened — Nick
try contacting the company you bought the screen from..if there is no evidence of damage to the flex cable or pins then maybe you have received a dud screen. A lot of companies are now testing all screens before shipping as people tend to crimp or damage the flex in installation and then claim a damaged screen was sent out. You need to check the returns policy and fine print.. — pollytintop
I sent an e-mail to the guy and he told me he tested them before they ship. I said I didn't know what happend, but I haven't seen it turn on and after replacing my old one it did work. I said I'm not stating its damaged, but possibly could be damaged. He said it's okay, since I ordered there a few parts before. He sent me a new screen and I've to send the old one back. Clearly got lucky there. Thanks for the help guys. — Mittchel